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Gazzetta Medica Italiana Archivio per le Scienze Mediche 2018 September;177(9):425-9

DOI: 10.23736/S0393-3660.17.03595-1

Copyright © 2017 EDIZIONI MINERVA MEDICA

language: English

Validity of the quantitative evaluation of the anterior drawer test using a magnetic tracking device

Hiroshi SHINOHARA 1 , Yukio URABE 2, Naoki ISHIHARA 3, Takayasu WAKIMOTO 4, Keisuke NAGAISHI 4, Ryu YAMAMOTO 4

1 Takarazuka University of Medical and Health Care, Takarazuka-City, Hyogo, Japan; 2 Graduate School of Biomedical and Health Sciences, Hiroshima University, Minami-ku, Hiroshima, Japan; 3 Rehabilitation College Shimane, Hamada-City, Shimane, Japan; 4 Southern Clinic Orthopedic and Internal Medicine, Naka-Ku, Hiroshima, Japan


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BACKGROUND: The anterior drawer (AD) test is an appropriate clinical examination for the evaluation of lateral ankle ligament injuries. The AD test is commonly assessed using X-rays. The functioning of the anterior talofibular ligament (ATFL) is evaluated by measuring the distance between the talus and tibia. However, it is difficult to quantitatively evaluate lateral ankle ligament function during exercise, such as walking and running. The purpose of this study was to clarify whether the AD test using a magnetic tracking device was valid, by comparing normal and functional ankle instability (FAI) groups.
METHODS: Ten male and two female volunteers (total 24 ankles) participated in this study. The ankles of subjects were divided into normal (14 ankles) and FAI groups (10 ankles) according to the results of a questionnaire. Anterior talar displacement was obtained using the plafond to dome X-rays method (AD). The degree to which the tibia moved on the calcaneus was calculated by using a magnetic tracking device as the anterior/posterior translation (APT). This study assessed validity by comparing APT with AD.
RESULTS: The correlation coefficient between AD and APT was 0.83. The normal group showed a significantly smaller AD and APT compared to those in the FAI group (p < 0.001).
CONCLUSIONS: The authors considered the validity of performing the AD test using a magnetic tracking device. Of notable interest was the demonstration of a tendency similar to X-rays, in the comparison between the normal and FAI groups. This device may have effective future use for motion analysis of ankle instability symptoms.


KEY WORDS: Lateral ligament, ankle - Wounds and injuries - Stress - X-rays

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